Practice problems of the circle - page 20 of 48
A circle is a geometric shape that consists of all points that are a fixed distance, called the radius, away from a central point called the center. The distance around the circle is called the circumference and the region enclosed by the circle is called the area of the circle. The formula for the circumference of a circle is C = 2πr, where C is the circumference, r is the radius, and π is a mathematical constant, the Ludolph number, approximately equal to 3.1415926.The formula for the area of a circle is A = πr2, where A is the area and r is the radius.
The diameter of a circle is a line segment that passes through the center of the circle and has its endpoints on the circle. It is the longest distance across the circle and is also twice the length of the radius. The formula for the diameter of a circle is d = 2 * r, where d is the diameter and r is the radius. The diameter of a circle is an important measurement in geometry and is used in many mathematical formulas, such as the formula for the circumference of a circle (C = πd)
Number of problems found: 941
- A bicycle
A bicycle wheel has a diameter of 63 cm. Calculate how many times the wheel turns round in traveling 19.8 km. - Pulley
On wheels with a diameter of 40 cm is fixed rope with the load. Calculate how far the load is lifted when the wheel turns seven times. - Flowerbed
We enlarged the circular flower bed, so its radius increased by 3 m. The substrate consumption per enlarged flower bed was (at the same layer height as before magnification) nine times greater than before. Determine the original flowerbed radius. - A circle
A circle relation is given to be x² + y² =16. What is the radius of the circle?
- Circumference 62124
The wheel circumference of the truck is 2 meters. The car covered a distance of 20km. How many times did the wheel have to turn? - Wheel turns
The diameter of the motorcycle wheel is 55 cm. How often does a motorcycle wheel turn on a 5 km long road? - Square circles
Calculate the length of the described and inscribed circle to the square ABCD with a side of 5cm. - Steering 8186
What force does the driver exert when turning on the steering wheel if the steering wheel diameter is 35 cm and the torque is 3.5 N. M? - Circumscribed 29561
Construct an isosceles triangle if a given circle circumscribed with a radius r = 2.6 cm is given.
- The terrace
Around the round pool with a diameter of 5.5 meters is a wooden terrace with a width of 130 cm. What is the area of the terrace? - Square and circles
Square with sides 83 cm is circumscribed and inscribed with circles. Determine the radiuses of both circles. - Wheel
The diameter of the motorcycle wheel is 52 cm. How many times rotates the wheel on the road long 2 km? - Diameter 6348
How many m did a wheel with a diameter of 22dm pass if it stopped after 30 turns? - Metal washers
Metal washers with a diameter of 80 mm are cut from a strip of steel sheet with a width of 10 cm and a length of 2 m. When two adjacent circles meet, calculate the material waste percentage if no material is lost.
- Diameter 23831
How often does a bicycle wheel with a diameter of 50 cm turn on a route 10 km long? The result round to an integer. - One-third 2872
The cycling racetrack has the shape of a circle with an area of 2 ha. How long will a cyclist drive one-third of a kilometer in a perimeter? - Calculate 48613
Calculate the radius of the circle if its diameter is 16.2 cm. Express the result in meters. - Sprinkler 48513
The rotary sprinkler has a spray of 20 m. What area of land can it irrigate from one place? - Clocks
The length of the minute hand is 12 cm. What track in meters will its endpoint describe in a week?
Do you have homework that you need help solving? Ask a question, and we will try to solve it.